PlaceTrack latest iteration has autocheckin and delayed sync

✓AutoCheck-in to Foursquare and Facebook: automatically checks you in to venues you have specified
✓delayed Latitude sync: stores your locations even when you’re offline and pushes them to your Latitude history when you’re back online
✓background mode now available even when you’re not logged into Latitude (for autocheckins or on-device location history)
✓locations accuracy overlay
✓starting from this version, iOS3.x is no longer supported
☂minor bug fixes and improvements